JP4749947B2 - Scrap removal method and scrap removal apparatus during laser cutting - Google Patents

Description

  The present invention relates to a scrap removing method and a scrap removing device at the time of laser cutting for a bag-like portion of a workpiece.

Patent Document 1 discloses a technique for preventing generated scrap pieces from falling into a box-shaped structural component when the box-shaped structural component is drilled by a laser. This is by pre-welding a wire cut to a certain size using a wire cutting device and an automatic welding device to the cutting location in advance, pausing the cutting in the middle of drilling and clamping the wire with a clamping device, Prevents scrap pieces from falling into box-type structural parts when cutting is complete.
Patent Document 2 discloses a technique for removing generated scrap pieces from a workpiece by a magnetic force or an air suction force when the workpiece is drilled by a laser.
Patent Document 3 discloses a technique for discharging generated scrap pieces to the outside when cutting with a laser robot. This is because the laser processing head is equipped with a negative pressure conveying means for attracting and capturing scrap pieces and an electromagnet pole bar. The electromagnet is excited just before the end of cutting and the scrap pieces are magnetized with the pole bar at the same time as the end of cutting. Then, by operating the negative pressure conveying means and demagnetizing the electromagnet pole bar, the scrap pieces are discharged to the outside by the negative pressure conveying means.
Japanese Patent Laid-Open No. 4-143089 No. 4-42078 JP-A-6-344173

The technique of the above-mentioned patent document 1 has a problem that the work is complicated and the cost of the wire is increased because it is necessary to weld a new wire to the cut portion for every drilling process. Moreover, since it is necessary to add a wire cutting device and an automatic welding device to the laser processing device, there is a problem that the entire facility is enlarged.
When the scrap piece is displaced when the scrap piece falls into the work piece, the technique of the above-mentioned Patent Document 2 interferes with the work piece when the scrap piece is taken out, and the scrap piece is taken out. There is a problem that it becomes difficult.
The technique of the above-mentioned Patent Document 3 has a problem that the laser processing head is enlarged and an electromagnet pole bar exciting device and a negative pressure generating device for negative pressure conveying means are required, so that the entire facility is enlarged.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the size of the entire equipment, facilitate the discharge of scrap pieces, and reduce the cost in the scrap removal method and scrap removal apparatus during laser cutting.

  As a means for solving the above-mentioned problems, the invention described in claim 1 is directed to subjecting a bag-like portion of a workpiece (for example, the workpiece W of the embodiment) to laser cutting by a laser cutting processing device (for example, the laser cutting processing device 1 of the embodiment). In this case, the scrap piece (for example, the scrap piece Wc of the embodiment) generated by the processing is discharged to the outside of the bag-shaped portion, and the workpiece is cut and removed (for example, the cut and removed portion Wa of the embodiment). In addition, a wire rod insertion hole (for example, the wire rod insertion hole Wb of the embodiment) is formed by a laser processing head (for example, the laser processing head 36 of the embodiment) of the laser cutting processing apparatus, and wound into the bag-shaped portion through the wire rod insertion hole. When a wire having a ridge (for example, the spring wire 11 of the embodiment) is supplied and a strip (for example, the strip 11a of the embodiment) is formed on the back side of the cut and removed portion, the wire is formed. After the laser processing head performs laser cutting around the cutting and removing portion to make the cutting and removing portion the scrap piece, the scrap piece is suspended by the wire and taken out of the bag-like portion. And the said scrap is discharged | emitted outside the said bag-shaped part by collect | recovering and extracting the said wire from the said scrap piece.

  The invention described in claim 2 is caused by the laser cutting process performed on the bag-like portion of the workpiece (for example, the workpiece W of the embodiment) by the laser cutting processing apparatus (for example, the laser cutting processing apparatus 1 of the embodiment). An apparatus for discharging the scrap piece (for example, the scrap piece Wc of the embodiment) to the outside of the bag-shaped portion, and adjacent to the laser processing head (for example, the laser processing head 36 of the embodiment) of the laser cutting processing apparatus. Wire supply / discharge means (for example, the wire supply / discharge device 20 of the embodiment) for supplying and discharging the wire (for example, the spring wire 11 of the embodiment) having a winding rod from the supply / discharge port (for example, the wire supply / discharge port 6a of the embodiment); Supply / exhaust port moving means (for example, supply / exhaust port moving device 14 in the embodiment) for moving the wire supply / exhaust port with respect to the laser processing head, and advancing / retreating the wire rod supply / discharge port with respect to the workpiece. A wire rod insertion hole (for example, the wire rod insertion of the embodiment), which is provided with a supply / discharge port advancement / retreat means (for example, the supply / discharge port lifting / lowering device 13 of the embodiment) and is formed in the cutting / removal portion of the workpiece (for example, the cut removal portion Wa of the embodiment). The wire supply / exhaust means is brought close to the hole Wb), the wire supply / discharge means supplies the wire through the wire insertion hole into the bag-like portion, and the wire is cut and removed. After forming the striated body (for example, the striated body 11a of the embodiment) on the back side of the part and performing the laser cutting process by the laser processing head around the cutting and removing part to make the cutting and removing part the scrap piece The scrap piece is suspended by the wire rod and taken out from the bag-shaped portion, and the wire rod is collected by the wire rod feeding / extracting means and extracted from the scrap piece. Characterized by discharging the pieces to the exterior of the bag portion.

According to the invention described in claim 1, the wire material is supplied into the bag-like portion through the wire material insertion hole formed in the cut and removed portion of the workpiece, and the wire material is formed on the back side of the cut and removed portion, thereby cutting. After the removal part becomes a scrap piece, it can be hung by a wire, and the scrap piece is taken out of the bag-like part, and the wire is collected and extracted from the scrap piece. It can be discharged outside the bag-like portion.
That is, it is possible to simply configure the wire feeding / discharging device mainly as a scrap removal device, and to suppress the enlargement of the entire facility and to easily and reliably discharge scrap pieces. In addition, the same wire can be used repeatedly for a predetermined number of laser cutting processes, and the processing cost can be reduced.

  According to the invention described in claim 2, in addition to the same effects as in claim 1, the wire rod can be reliably inserted through the wire insertion hole by moving the wire supply / exhaust port forward and backward with respect to the workpiece, and thereafter The wire supply / exhaust port can be moved relatively freely together with the laser processing head, and can cope with laser cutting processing of various shapes with a simple configuration. At this time, it becomes possible to perform laser cutting while moving the wire supply / exhaust port so that the laser beam from the laser processing head does not cross the wire, and once the laser processing head does not reciprocate the outer periphery of the cutting / removing part. It becomes possible to cut the entire circumference only by the rounding of the machining, and the processing cost can be further reduced.

Embodiments of the present invention will be described below with reference to the drawings.
The laser cutting processing apparatus 1 shown in FIG. 1 is formed by supporting a laser processing head 36 for laser beam irradiation at the tip of an arm of an articulated robot 1a. A scrap removing device 12 for discharging the scrap piece Wc generated by the processing to the outside of the bag-like portion is provided. In the drawings, the arrow FR indicates the front, the arrow LH indicates the left side, and the arrow UP indicates the upper side.

The arm of the articulated robot 1a mainly includes the first arm 3a portion on the laser processing head 36 side and the second arm 3b portion on the base side.
Referring also to FIG. 2, an elevation surface portion 2 b of a plate-like support member 2 bent in a substantially L shape is attached to the tip of the first arm 3 a portion. The flat portion 2 a of the support member 2 supports a laser processing head 36 and a later-described supply / discharge port lifting / lowering device 13 in the scrap removal device 12.

  The laser processing head 36 has a cylindrical shape extending downward from the flat surface portion 2a of the support member 2, and is supported by the flat surface portion 2a so that the upper end portion thereof is rotatable about the axis. The lower end of the laser processing head 36 is a laser irradiation unit 36a, and a laser beam is irradiated on the axis line downward from the laser irradiation unit 36a. The upper end portion of the laser processing head 36 is located on the flat portion 2a, and the driven gear 4 is coaxially fixed to the upper end portion. A servo motor 10 that meshes the driven gear 4 with a drive gear (not shown) is supported on the flat surface portion 2a. From the upper end of the laser processing head 36, the optical fiber cable 5 for introducing a laser beam extends upward.

  5 and 6, the scrap removing device 12 supplies the spring wire 11 having the curl in the bag-like portion through the wire insertion hole Wb formed in the workpiece W, and the spring wire 11 is supplied to the spring wire 11 in the bag-like portion. By forming the winding shape, the scrap piece Wc generated by the laser cutting process can be suspended by the spring wire 11, and the scrap piece Wc can be removed outside the bag-like portion. The spring wire 11 is made of spring steel with a curl to form a curl shape under no load and at normal temperature, but is made of a shape memory alloy that generates the curl by temperature rise, The resin may have any of the above characteristics.

  The spring wire 11 is drawn out or wound up from the wire supply / discharge device 20. The wire feeding / discharging device 20 is formed by extending a flexible guide pipe 6 through which a spring wire 11 is slidably inserted from a drive unit 20a supported on a base end portion of a first arm 3a. After passing through the upper end of the laser processing head 36, the guide pipe 6 is disposed adjacent to the laser processing head 36 at the tip side below the flat portion 2 a of the support member 2. Note that a guide frame 2 c into which the optical fiber cable 5 and the guide pipe 6 are loosely inserted is provided at the upper end portion of the elevation surface portion 2 b of the support member 2.

  Below the flat surface portion 2 a of the support member 2, an elevating cylinder 7 extending vertically is disposed adjacent to the optical fiber cable 5 and the guide pipe 6. The elevating cylinder 7 has a cylinder body 7a on the upper side and a piston rod 7b on the lower side. The upper end of the cylinder body 7a is supported by the laser processing head 36, and the lower end of the piston rod 7b is A support plate 8 substantially perpendicular to this is attached. A guide pipe 6 penetrating the support plate 8 is supported by the support plate 8, and a tip portion of the guide pipe 6 protrudes below the support plate 8. A lower end opening of the guide pipe 6 is a wire supply / exhaust port 6a through which the spring wire 11 is supplied or recovered. The wire supply / discharge port 6 a can be moved up and down by a supply / discharge port lifting / lowering device 13 mainly including the lifting cylinder 7 and the support plate 8.

  Here, in a state in which the laser processing head 36 performs laser cutting processing on the workpiece W, the lower end opening (wire supply / exhaust port 6a) of the guide pipe 6 can be brought into contact with the surface of the workpiece W by the extension operation of the elevating cylinder 7. And is separated from the surface of the workpiece W by the shortening operation of the elevating cylinder 7. That is, the wire supply / exhaust port 6a can be advanced / retracted with respect to the workpiece W by the operation of the supply / exhaust port lifting / lowering device 13.

  Further, when the laser processing head 36 is rotated around its axis together with the driven gear 4 by the operation of the servo motor 10, the lifting cylinder 7 and the guide pipe 6 adjacent to the laser processing head 36 are also rotated integrally with the laser processing head 36. The relative position with respect to the processing head 36 is changed from front to back and left and right. That is, the wire supply / exhaust port 6 a of the guide pipe 6 can be rotated around the laser irradiation part 36 a of the laser processing head 36 by the supply / discharge port moving device 14 mainly including the servo motor 10 and the driven gear 4.

  As shown in FIGS. 3 and 4, the drive unit 20 a of the wire feeding / discharging device 20 is provided with both side walls 22 a and 22 c and a central wall 22 b extending over the substrate 21, and a substantially U-shaped support frame in plan view. 22, and the drive motor 23 is supported outside the central wall 22 b of the support frame 22. Inside the support frame 22, a driving roller 24 attached to a driving shaft 23 a of the driving motor 23 is disposed. The front end portion of the drive shaft 23a of the drive motor 23 is rotatably supported by a bearing 25a of a bearing plate 25 attached across both side walls 22a and 22c.

  One end portion of a support arm 27 that supports the driven roller 26 is swingably supported via a bracket 28 at the upper end portion of the one side wall 22 c of the support frame 22. Further, the lower end portion of the support rod 29 inserted into the other end portion of the support arm 27 is supported by the upper end portion of the other side wall 22 a of the support frame 22 via the bracket 30 so as to be swingable. An upper portion of the support rod 29 is a screw portion 29a, and a nut member 31 is screwed to the screw portion 29a. A predetermined coil spring 34 is contracted between the upper receiving member 32 on the lower surface of the nut member 31 and the lower receiving member 33 on the upper surface of the other end of the support arm 27.

  The lower end of the outer periphery of the driven roller 26 is located immediately above the upper end of the outer periphery of the driving roller 24, and the elastic force of the coil spring 34 acts on the driven roller 26, so that the lower end of the driven roller 26 contacts the upper end of the driving roller 24 in a pressed state. . On the outer periphery of the drive roller 24, a V-shaped groove 24a for allowing the spring wire 11 to enter only about half of its cross section is formed. A base end portion of the guide pipe 6 is penetrated and supported by the one side wall 22c of the support frame 22, and a distal end portion of an upstream guide pipe 35 extending from a wire material storage portion (not shown) penetrates the other side wall 22a. Supported.

  The proximal end of the guide pipe 6 and the distal end of the upstream guide pipe 35 are opposed to each other, and the spring wire 11 extending from the upstream guide pipe 35 is in contact with the rollers 24 and 26 while entering the V-shaped groove 24a. It is sandwiched and inserted into the guide pipe 6 on the downstream side. Then, the rollers 24 and 26 are driven to rotate by the operation of the drive motor 23 to send the spring wire 11 to any one of the guide pipes 6 and 35, so that the spring wire 11 from the wire supply / discharge port 6 a of the guide pipe 6. Is supplied or recovered.

Next, a process of performing laser cutting processing on the bag-shaped portion of the workpiece W by the laser cutting processing device 1 and discharging the scrap pieces Wc generated by the processing to the outside of the bag-shaped portion will be described.
First, as shown in FIG. 5, by the operation of the articulated robot 1a, the laser irradiation unit 36a at the tip of the laser processing head 36 is disposed above the substantially central portion of the bag-shaped cut and removal unit (scrap forming unit) Wa of the workpiece W. Is moved, and a laser beam is irradiated from the laser irradiation part 36a to form a wire insertion hole Wb at a substantially central part of the cutting and removing part Wa. At this time, the guide pipe 6 has the wire supply / discharge port 6a at the tip thereof separated from the surface of the workpiece W.

  Next, as shown in FIG. 6, the laser processing head 36 is retracted from above the wire insertion hole Wb by the operation of the articulated robot 1a, and the wire supply / discharge port 6a at the tip of the guide pipe 6 is provided above the wire insertion hole Wb. After the movement, the wire supply / discharge port 6a is brought into contact with the surface of the workpiece W by the extension operation of the elevating cylinder 7. In this state, the drive motor 23 of the drive unit 20a is operated and the spring wire 11 is fed into the guide pipe 6 by both rollers 24 and 26, whereby the spring wire 11 is released from the wire supply / discharge port 6a at the tip of the guide pipe 6. The spring wire 11 is fed out and supplied into the bag-like portion through the wire insertion hole Wb.

  The spring wire 11 supplied into the bag-like portion immediately forms a winding shape on the back surface side (inner surface side) of the cut and removed portion Wa. When the spring wire 11 is supplied into the bag-like portion for a predetermined length, the spring wire 11 is wound in a ridge shape on the back side of the cut and removed portion Wa to form a striated body 11a with sufficient resilience. Abuts on the back surface of the cut-off portion Wa.

  Next, as shown in FIG. 7, the wire rod supply / exhaust port 6a of the guide pipe 6 is separated from the surface of the workpiece W by the shortening operation of the elevating cylinder 7, and laser processing is performed by the operation of the articulated robot 1a as shown in FIG. The laser irradiation part 36a of the head 36 is moved above the cutting start position on the outer periphery of the cutting removal part Wa. At this time, the spring wire 11 extending between the wire supply / exhaust port 6a of the guide pipe 6 and the wire insertion hole Wb of the workpiece W bends, and part of the spring wire 11 enters / exits the bag-like portion, thereby supplying / discharging the wire. It can respond to the change of the relative position between the opening 6a and the wire insertion hole Wb. Further, by ensuring a sufficient supply length of the spring wire 11 into the bag-like portion, the resilience to the back surface of the cut-off portion Wa is not reduced.

  Next, the articulated robot 1a is operated while irradiating a laser beam from the laser irradiation unit 36a to start laser cutting processing on the outer periphery of the cutting / removing unit Wa. At this time, as shown in FIG. 9, the guide pipe 6 together with the laser processing head 36 is operated by the operation of the servo motor 10 of the supply / exhaust port moving device 14 so as to synchronize with the circumference of the outer periphery of the cutting / removal portion Wa of the laser processing head 36. , And the wire material supply / exhaust port 6a is rotated around the laser irradiation unit 36a, so that the relative positional relationship between the laser irradiation unit 36a, the wire material supply / exhaust port 6a, and the wire material insertion hole Wb can be kept substantially constant. Thus, it is possible to prevent the laser beam from crossing and cutting the spring wire 11.

  As shown in FIG. 9, if the cut-off portion Wa has a circular shape in plan view, the distance from the wire insertion hole Wb formed at the substantially central portion to the outer periphery hardly changes over the entire circumference. As shown in FIG. 10, for example, in the case of the cut-and-removed portion Wa having a square shape in plan view, the distance from the wire insertion hole Wb formed at the substantially central portion to the outer periphery changes relatively greatly. Even in such a change, as described above, the spring wire 11 extending between the wire supply / exhaust port 6a of the guide pipe 6 and the wire insertion hole Wb of the workpiece W bends and goes in and out of the bag-like portion. It is possible to cope with.

  Further, when cutting the entire circumference of the cutting / removing portion Wa, the laser processing head 36 is rotated substantially once around its axis. By stopping the laser beam irradiation at one end and performing the reverse operation of the laser processing head 36 before the circumferential cutting, the twisting of the optical fiber cable 5 and the spring wire 11 can be suppressed without using a special structure. Further, the laser processing head 36 and the guide pipe are prevented from crossing the spring wire 11 even if the rotation of the laser processing head 36 is not completely synchronized with the circumference of the outer periphery of the cutting and removing portion Wa, for example, intermittently rotates. 6 and the phase can be controlled.

  When the laser processing head 36 returns to above the cutting start position and the cutting processing of the entire cutting removal portion Wa is completed, the cutting removal portion Wa becomes a scrap piece Wc independent of the workpiece W. At this time, the scrap piece Wc is held by the elastic force of the strip 11a formed on the back surface side thereof to prevent the scrap piece Wc from coming off from the spring wire 11, so that the scrap piece Wc is suspended by the spring wire 11. The fall into the bag-like part can be prevented.

And after moving the scrap piece Wc suspended by the spring wire 11 by the action | operation of the articulated robot 1a on the discharge tray not shown, the spring wire 11 is collect | recovered by the action | operation of the wire supply / discharge device 20, and this is collected. By pulling out from the scrap piece Wc, the strip 11a on the back side of the scrap piece Wc disappears and its holding is released, and the scrap piece Wc can be dropped and discharged onto the discharge tray.
In addition, after the above-mentioned process is repeated and cutting is performed on a plurality of workpieces W, when the curl of the spring wire 11 is weakened, the tip end side of the spring wire 11 is cut by a predetermined length and the new What is necessary is just to draw out a part sequentially and to use it.

  As described above, in the scrap removing method in the above embodiment, when laser cutting is performed on the bag-shaped portion of the workpiece W by the laser cutting processing apparatus 1, the scrap piece Wc generated by the processing is removed from the outside of the bag-shaped portion. A wire rod insertion hole Wb is formed in the cut and removed portion Wa of the workpiece W by the laser processing head 36 of the laser cutting processing apparatus 1 and wound into the bag-shaped portion through the wire rod insertion hole Wb. A spring wire 11 having a ridge is supplied, and a striated body 11a is formed on the back side of the cut and removed portion Wa on the spring wire 11 and laser cutting is performed around the cut and removed portion Wa by the laser processing head 36. After the cut and removed portion Wa is made the scrap piece Wc, the bag-like portion is hung from the scrap piece Wc by the spring wire 11. Outside extraction, and the spring wire 11 is recovered by extracting from the scrap pieces Wc, is intended to discharge the scrap piece Wc outside of the bag portion.

According to this configuration, the spring wire 11 is supplied into the bag-like portion through the wire insertion hole Wb formed in the cut and removed portion Wa of the workpiece W, and the spring wire 11 is formed on the back side of the cut and removed portion Wa in the spring wire 11. Thus, after the cutting and removing portion Wa becomes the scrap piece Wc, it can be suspended by the spring wire 11, and the scrap piece Wc is taken out of the bag-like portion and the spring wire 11 is collected and removed. By extracting from the scrap piece Wc, the scrap piece Wc can be discharged to the outside of the bag-like portion.
That is, the wire feeding / discharging device 20 can mainly be configured simply with the scrap removing device 12 to suppress the enlargement of the entire facility and to easily and reliably discharge the scrap piece Wc. Further, the same spring wire 11 can be used repeatedly for a predetermined number of laser cutting processes, and the processing cost can be reduced.

  In addition, when the scrap removing device 12 in the above-described embodiment performs laser cutting processing on the bag-shaped portion of the workpiece W by the laser cutting processing device 1, the scrap piece Wc generated by the processing is discharged to the outside of the bag-shaped portion. A wire rod supply / discharge device 20 that feeds and discharges a spring wire 11 having a curl from a wire rod supply / discharge port 6a adjacent to the laser processing head 36 of the laser cutting processing device 1, and the laser processing head 36. A wire supply / discharge port moving device 14 for moving the wire supply / discharge port 6a, and a supply / discharge port lifting / lowering device 13 for moving the wire supply / discharge port 6a forward and backward with respect to the workpiece W. The wire rod supply / exhaust device 13 is brought close to the wire rod insertion hole Wb formed in Wa, and the wire rod supply / discharge device 20 passes through the wire rod insertion hole Wb. The spring wire 11 is supplied into the bag-like portion, and the spring wire 11 is formed with the striated body 11a on the back side of the cut and removed portion Wa, and the laser processing head 36 performs laser cutting around the cut and removed portion Wa. After the cut and removed portion Wa is processed into the scrap piece Wc, the scrap piece Wc is suspended by the spring wire 11 and taken out of the bag-like portion, and the wire feeding / discharging device 20 By collecting the spring wire 11 and extracting it from the scrap piece Wc, the scrap piece Wc is discharged to the outside of the bag-like portion.

  According to this configuration, in addition to the same effect as the scrap removing method, by moving the wire supply / exhaust port 6a forward and backward with respect to the workpiece W, the spring wire 11 can be reliably inserted into the wire insertion hole Wb, and thereafter In addition, the wire supply / exhaust port 6a can be moved relatively freely together with the laser processing head 36, and various shapes of laser cutting processing can be handled with a simple configuration. At this time, it becomes possible to perform laser cutting while moving the wire supply / exhaust port 6a so that the laser beam from the laser processing head 36 does not cross the spring wire 11, and the laser processing head 36 reciprocates around the outer periphery of the cutting removal portion Wa. Even if it does not move, it becomes possible to cut the entire circumference with only one round, and the processing cost can be further reduced.

  The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the wire rod supply / exhaust port 6a of the guide pipe 6 can be relatively moved up and down only with respect to the laser irradiation portion 36a of the laser processing head 36 ( The guide pipe 6 and the laser processing head 36 are integrally moved horizontally in the front, rear, left, and right directions. On the other hand, the guide pipe 6 is moved up and down relative to the laser processing head 36 and horizontally. It may be configured to be movable. In this case, as shown in FIG. 11, laser cutting can be performed in a state where the wire supply / exhaust port 6a of the guide pipe 6 is in contact with the wire insertion hole Wb of the workpiece W, and the cutting removal portion Wa (scrap piece) The laser cutting process and the work of discharging the scrap piece Wc can be performed in a state in which Wc) is always stably held by the tip of the guide pipe 6 and the elongated body 11a in the bag-like portion.

It is a perspective view which shows the articulated robot with which the scrap removal apparatus in the Example of this invention was mounted | worn. It is the A section enlarged view of FIG. It is the B section enlarged front view of FIG. It is AA sectional drawing of FIG. It is 1st operation | movement explanatory drawing of the process of removing a scrap piece at the time of laser cutting by the said scrap removal apparatus. It is 2nd operation | movement explanatory drawing of the said process. It is a 3rd operation explanatory view of the above-mentioned process. It is a 4th operation explanatory view of the above-mentioned process. It is effect | action explanatory drawing which shows the flow at the time of the said laser cutting process in order of (a)-(d). FIG. 10 is an operation explanatory diagram illustrating a flow at the time of laser cutting for a workpiece different from FIG. 9 in the order of (a) to (d). It is operation | movement explanatory drawing equivalent to FIG. 8 which shows the application example of the said Example.

Explanation of symbols

W Work Wa Cutting and removing part Wb Wire material insertion hole Wc Scrap piece 1 Laser cutting device 6a Wire material supply / discharge port 11 Spring wire material (wire material)
11a striated body 13 supply / exhaust port lifting / lowering device
14 Supply / exhaust port moving device (supply / discharge port moving means)
20 Wire rod supply / discharge device (wire rod supply / discharge means)
36 Laser processing head

Claims (2)

A method of discharging scrap pieces generated by the processing to the outside of the bag-shaped portion when performing laser cutting processing on the bag-shaped portion of the workpiece with a laser cutting processing device,
A wire insertion hole is formed in the cut and removal portion of the workpiece by the laser processing head of the laser cutting apparatus, and a wire rod having a curl is supplied into the bag-like portion through the wire insertion hole, and the cutting and removal is performed on the wire rod. After forming the striated body on the back side of the part and performing laser cutting with the laser processing head around the cutting and removing part to make the cutting and removing part the scrap piece, the scrap piece is suspended by the wire rod Scrap at the time of laser cutting processing, wherein the scrap piece is discharged to the outside of the bag-like part by lowering and taking out the bag-like part and collecting the wire rod and extracting it from the scrap piece Removal method. A device for discharging a scrap piece generated by the processing to the outside of the bag-shaped portion when laser cutting is performed on the bag-shaped portion of the workpiece by a laser cutting processing device,
Wire supply / discharge means for supplying / discharging a wire rod having a winding rod from a wire supply / exhaust port adjacent to the laser processing head of the laser cutting processing apparatus, and a supply / discharge port for moving the wire supply / exhaust port relative to the laser processing head Moving means, and supply / exhaust port advancing / retreating means for advancing and retracting the wire supply / exhaust port with respect to the workpiece,
The wire rod supply / exhaust means is brought close to the wire rod insertion hole formed in the cut and removal portion of the workpiece, and the wire rod is fed into the bag-like portion through the wire rod insertion hole by the wire rod supply / discharge means. After supplying the wire and forming a strip on the back side of the cutting and removing portion on the wire, laser cutting is performed by the laser processing head around the cutting and removing portion to make the cutting and removing portion the scrap piece. The scrap piece is suspended by the wire rod and taken out of the bag-shaped portion, and the wire rod is collected by the wire rod supply / discharge means and extracted from the scrap piece. A scrap removal device for laser cutting, which is discharged outside.

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